C([O:4][CH2:5][C:6]1[C:11]([N:12]2[CH2:24][CH2:23][N:15]3[C:16]4[CH2:17][CH2:18][CH2:19][CH2:20][C:21]=4[CH:22]=[C:14]3[C:13]2=[O:25])=[CH:10][C:9]([F:26])=[CH:8][C:7]=1[C:27]1[CH:28]=[C:29]([NH:36][C:37]2[CH:42]=[CH:41][C:40]([N:43]3[CH2:48][CH2:47][N:46]([CH:49]4[CH2:52][O:51][CH2:50]4)[CH2:45][CH2:44]3)=[CH:39][N:38]=2)[C:30]2[N:31]([N:33]=[CH:34][N:35]=2)[CH:32]=1)(=O)C.[Li+].[OH-]>CC(O)C.C1COCC1.O>[F:26][C:9]1[CH:8]=[C:7]([C:27]2[CH:28]=[C:29]([NH:36][C:37]3[CH:42]=[CH:41][C:40]([N:43]4[CH2:44][CH2:45][N:46]([CH:49]5[CH2:50][O:51][CH2:52]5)[CH2:47][CH2:48]4)=[CH:39][N:38]=3)[C:30]3[N:31]([N:33]=[CH:34][N:35]=3)[CH:32]=2)[C:6]([CH2:5][OH:4])=[C:11]([N:12]2[CH2:24][CH2:23][N:15]3[C:16]4[CH2:17][CH2:18][CH2:19][CH2:20][C:21]=4[CH:22]=[C:14]3[C:13]2=[O:25])[CH:10]=1A mixture of 108e (250 mg, 0.35 mmol) and LiOH (300 mg, 10 mmol) in iPrOH/THF (1:1, 3.5 mL) and H2O (1 mL) was stirred at 50° C. for 0.5 h. The mixture was evaporated in vacuo and the residue was extracted with Ethyl acetate (5 mL×2). The combined Ethyl acetate extract was concentrated under reduced pressure and the residue was purified with reverse-phase prep-HPLC to afford 108 (110 mg, 25%). LCMS: [M+H]+ 664. 1H NMR (500 MHz, DMSO) δ 9.33 (s, 1H), 8.67 (s, 1H), 8.55-8.54 (m, 2H), 7.95 (d, J=3.0, 1H), 7.44-7.41 (m, 2H), 7.37-7.33 (m, 2H), 6.53 (s, 1H), 4.98 (t, J=5.0, 1H), 4.55-4.54 (m, 2H), 4.45-4.44 (m, 2H), 4.13-4.32 (m, 5H), 3.91 (s, 1H), 3.43-3.41 (m, 1H), 3.10 (s, 4H), 2.60-2.38 (m, 8H), 1.78-1.76 (m, 2H), 1.69-1.67 (m, 2H)
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